Flexbe service specializes in website development for business. Among them are the usual sites, landing page, online stores, quizzes. To use your domain, you need to set special NS-servers in it.
First, you need to register name servers in the domain: open the "Domains" section and click on the gear next to your domain.
Once on the settings page, go down to the "NS-servers" section. You need to select "Custom name servers" from the drop-down list and then click on the "Change" button to edit them:
Now you can edit the list of NS servers. Instead of the current ones, you need to insert the marketplace name servers:
Now click on the "Save" button and wait for the update of the records with your Internet provider. The update usually takes from a couple of hours to a day.